ANSI+ABMA-7-1995(R2001)

ANSIIABMA

Std. 7 - 1995

(Revision and redesignation of

ANSUAFBMA

Std. 7 - 1988)

AMERICAN NATIONAL STANDARD

ABMA STANDARD

SHAFT AND HOUSING FITS FOR

METRIC RADIAL BALL AND ROLLER BEARINGS

(EXCEPT TAPERED ROLLER BEARINGS)

CONFORMING TO BASIC BOUNDARY PLAN

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Sponsored by

American Bearing Manufacturers

Association, Inc.

Approved October 27, 1995

AMERICAN

NATIONAL

STANDARD

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due process, consensus, and other criteria for approval have been met by the standards developer.

Consensus is established when, in the judgment of the ANSI Board of Standards Review, substantial

agreement has been reached by directly and materially affected interests. Substantial agreement

means much more than a simple majority, but not necessarily unanimity.

Consensus requires that all

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respect preclude anyone, whether he has approved the standards or not, from manufacturing,

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of any American National Standard.

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of an American National Standard in the name of the

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should be addressed to the

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NOTICE:

This American National Standard may be revised or withdrawn at any time.

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Published by

American Bearing Manufacturers

Association, Inc.

(formerly Anti-Friction

Bearing Manufacturers

Association, Inc.)

1200 19th Street, N. W., Suite 300

Washington, D.C. 200362412

Q Copyright 1995 hy American Bearing Manufacturers

Association, Inc.

All rights reserved. No part of this publication may be reproduced in any form, in an electronic

retrieval system or otherwise, without prior written permission of the publisher.

FOREWORD

This foreword is not a part of ANSI/ABMA Standard 7 - 1995, Shaft and Housing Fits for

Metric Ball and Roller Bearings (Except Tapered Roller Bearings) Conforming to Basic

Boundary Plan.

This American National Standard provides the general selection of shaft and housing fits for

metric radial ball and roller bearings of tolerance classes ABEC-1 and RBEC-1. Bearing type,

loading and other design requirements influence the criteria for shaft and housing fits.

The dimensions, tolerances and clearances stated in this standard are based on metric units and

are found in Part I of the various tables. A soft conversion to tJ.S. customary (inch-pound)

units is provided in Part II of the various tables for the convenience of the user.

Suggestions for the improvement of this standard gained through experience with its use will be

welcomed. These should be sent to the American National Standards Institute, Inc., 11 West

42nd Street, New York, NY 10036.

The officers of Accredited Standards Committee B3 operating under the American National

Standards Institute procedures and the organizations represented at the time this standard was

submitted are as follows:

W.G. Looft, Chairman

G.T. Satterfield, Secretary

American Bearing Manufacturers Association

Hydraulic Institute

Association for Manufacturing Technology

Society of Tribologists and Lubrication Engineers

U.S. Department of Defense, DISC

U . S . Department of the Navy

This~pnoductionm&bycustQnnstandruds

Services, SO2 Oakhnd Ave, Suite 5, Ann Arbor, MI 48104 (800) 699-9277, under myeky ,,qew& Nofutherreproduabnis~

ABMA (formerly AFBMA) Standards

for

Ball and Roller Bearings

1 - Terminology for Anti-Friction Ball and Roller Bearings and Parts

4 - Tolerance Definitions and Gauging Practices for Ball and Roller Bearings

7 - Shaft and Housing Fits for Metric Radial Ball and Roller Bearings (Except Tapered Roller Bearings)

Conforming to Basic Boundary Plan

8.1 - Mounting Accessories, Metric Design

8.2 - Mounting Accessories, Inch Design

9 - Load Ratings and Fatigue Life for Ball Bearings

10 - Metal Balls

11 - Load Ratings and Fatigue Life for Roller Bearings

12.1 - Instrument Ball Bearings, Metric Design

12.2 - Instrument Ball Bearings, Inch Design

13 - Rolling Bearing Vibration and Noise (Methods of Measuring)

14 - Housings for Bearings with Spherical Outside Surfaces

15 - Ball Bearings with Spherical Outside Surfaces and Extended Inner Ring Width (Includes Eccentric

Locking Collars)

16.1 - Airframe Ball, Roller, and Needle Roller Bearings, Metric Design

16.2 - Airframe Ball, Roller, and Needle Roller Bearings, Inch Design

17 - Needle Rollers, Metric Design

18.1 - Needle Roller Bearings, Radial, Metric Design

18.2 - Needle Roller Bearings, Radial, Inch Design

19.1 - Tapered Roller Bearings, Radial, Metric Design

19.2 - Tapered Roller Bearings, Radial, Inch Design

20 - Radial Bearings of Ball, Cylinder Roller and Spherical Roller Types, Metric Design

21.1 - Thrust Needle Roller and Cage Assemblies and Thrust Washers, Metric Design

21.2 - Thrust Needle Roller and Cage Assemblies and Thrust Washers, Inch Design

22.1 - Spherical Plain Radial Bearings, Joint Type - Metric Design

22.2 - Spherical Plain Radial Bearings, Joint Type - Inch Design

23.2 - Thrust Bearings of Tapered Roller Type - Inch Design

24.1 - Thrust Bearings of Ball, Cylindrical Roller and Spherical Roller Types - Metric Design

24.2 - Thrust Bearings of Ball and Cylindrical Roller Types - Inch Design

25.2 - Rolling Bearings, Linear Motion, Recirculating Ball, Sleeve Type - Inch Series

26.2 - Thin Section Ball Bearings - Inch Design

An ABMA Standard is intended as a guide to aid the manufacturer, the consumer, and the general public. The

existence of an ABMA Standard does not in any respect preclude anyone, whether he has approved the standard or

not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the

standard. ABMA Standards are subject to revision or withdrawal at any time and users who refer to an ABMA

Standard should satisfy themselves that they have the latest information from the Association.

American National Standard

ABMA Standard

Shaft and Housing Fits for Metric Radial Ball and Roller Bearings

(Except Tapered Roller Bearings)

Conforming to Basic Boundary Plan

CONTENTS

Section

Page

1. Scope ...

..l

2. Conformity with other ANSI Standards ...

1

3. Description of Shaft and Housing Tolerance Classifications ...

1

4. Selection of Shaft and Housing Fits ...

4

4.1 ShaftFi~ ...

...4

4.2 HousingFits ...

.

5. Design and Installation Considerations ...

5

5.1 Effect of Fit on Bearing Internal Clearance ...

5

5.2 Allowance for Axial Displacement ...

5

5.3 Installation Techniques ...

5

6. Symbols and Nomenclature ...

6

LIST OF FIGURES

Figure

No.

Page

1. Graphical Representation of Shaft Fits ...

2

2. Graphical Representation of Housing Fits ...

3

3. Classification of Loads in Relation to Basic Radial Load Rating C, ...

5

LIST OF TABLES

TABLE

No.

1. .Selection of Shaft Tolerance Classifications ...

7

2. Shaft Diameter Limits and Resultant Fits ...

9

3. Selection of Housing Tolerance Classifications ...

11

SHAFT AND HOUSING FITS FOR METRIC

RADIAL BALL AND ROLLER BEARINGS

(EXCEPT TAPERED ROLLER BEARINGS)

CONFORMING TO BASIC BOUNDARY PLAN

1. Scope

This standard covers the general selection of

shaft and housing fits for metric radial ball and

roller bearings of tolerance classes ABEC 1 -

RBEC 1 as influenced by the type and extent of

bearing loading and other design requirements.

Other tolerance classes are not covered by this

standard.

Recommendations for the fitting practices of

some particular types of ball and roller bearings

are covered in other ANSI/ABMA standards.

These include:

ANSUABMA

Std. No.

12.1 & 12.2

Instrument Ball Bearings

16.1 & 16.2

Airframe Ball, Roller and

Needle Roller Bearings

18.1 & 18.2

Needle Roller Bearings

19.1 & 19.2

Tapered Roller Bearings

26.2

Thin Section Ball

Bearings

This standard can also be used as a guide for

determining shaft and housing dimensions for

inch design ball and roller bearings by using

the recommended shaft and housing fits for

metric bearings and applying the appropriate

bore and O.D. tolerances for the inch design

bearings, except those bearings covered by

ANSUABMA Standard 15.

2. Conformity

with Other ANSI

Standards

In the size range O-2500 mm, the deviations

used in this standard for shaft and housing seats

conform to American National Standard ANSI

B4.2, “Preferred Metric Limits and Fits”.

3. Description of Shaft and Housing

Tolerance Classifications

In the size range described in 2 above, the

tolerance classifications are designated by a

letter and a numeral. A lower case letter is

used’for shafts and a capital letter is used for

housings. Numerals indicate the degree of

accuracy - the smaller numerals representing

closer tolerances than the larger. The letters

indicate the location of the shaft and housing

limits relative to the inner ring bore and outer

ring outside diameter tolerance ranges indicated

in Figures 1 and 2 by the symbols KB and hB

respectively.

Figures 1 and 2 show graphically how the

various tolerance classifications result in

clearance or interference depending upon how

the diameters of the mating parts interact in

specific cases.

A

INTERFERENCE

OUTER

RING

0.0.

TOLERANCE

RANGE

HoustNG

BORE

TOLERANCE

RANGES

4. Selection of Shaft and Housing Fits

To select the proper fits, it is necessary to

consider the type and extent of the load,

bearing type, and certain other design and

performance requirements.

The required shaft and housing fits are

indicated in Tables 1 and 3. The terms

“Light”, “Normal” and “Heavy” loads refer to

radial loads that are generally related to C, as

shown in Figure 3 (C,, being the Basic

Dynamic Radial Load Rating computed in

accordance with ANSI/ABMA Standards).

4.1 Shaft Fits. Table 1 indicates the initial

approach to shaft fit selection. Note that for

most normal applications where the shaft

rotates and the radial load direction is constant,

an interference fit should be used. Also, the

heavier the load, the greater is the required

interference. For stationary shaft conditions

and constant radial load direction, the inner

ring may be moderately loose on the shaft.

Table 2 shows the shaft diameter deviations and

resultant fits for the various tolerance

classifications for bore sizes over 3 mm and up

to 1250 mm.

4.2 Housing Fits. Table 3 indicates the

initial approach to housing fit selection. Note

that the use of clearance or interference fits is

mainly dependent upon which bearing ring

rotates in relation to the radial load. For

indeterminate or varying load directions, avoid

clearance fits. Clearance fits are preferred in

axially split housings to avoid distorting bearing

outer rings. The extent of the radial load also

influences the choice of fit.

Table 4 shows the housing bore deviations and

resultant fits for the various tolerance

classifications for outer diameter sizes over 10

mm and up to 2500 mm.

5. Design and Installation

Considerations

5.1 Effect of Fit on Bearing Internal

Clearance. Since interference fitting will

reduce bearing radial internal clearance, it is

recommended that prospective users consult

bearing manufacturers to make certain that the

required bearings are correctly specified to

satisfy all mounting, environmental and other

operating conditions and requirements. This is

particularly necessary in those cases where heat

sources in associated parts may further

diminish bearing clearances in operation.

Standard values of radial internal clearances of

radial bearings are listed in ANSUABMA

Standard 20.

5.2 Allowance for Axial Displacement.

Consideration should be given to axial

displacement of bearing components due to

thermal expansion or contraction of associated

parts. Displacement may be accommodated

either by the internal construction of the

bearing or by allowing one of the bearing rings

to be axially displaceable. For unusual

applications consult bearing manufacturers.

5.3 Installation Techniques. Damage to

internal bearing surfaces may result from the

transmission of mounting forces through the

rolling elements. Therefore, methods and tools

should be used that apply these forces directly

to the ring or rings being interference fitted.

To facilitate the installation of bearings on their

seatings with interference fits, bearings or

housings, as the case requires, may be

thermally expanded by heating under controlled

conditions. Bearing temperatures should not be

allowed to exceed 120°C (250°F) to avoid

‘reducing bearing hardness.

Heating of pre-lubricated bearings should be

avoided to prevent deterioration of the

lubricant. Alternatively, shafts or bearings

may be chilled to provide sufficient contraction

to facilitate installation. The bearing

manufacturer should be contacted for

information on low temperature limit and

methods of cooling. Precautions should be

observed to avoid corrosion through the

creation of excessive atmospheric moisture

condensation on bearings or other parts during

this process.

6. Symbols and Nomenclature

The following symbols and nomenclature are

used in this standard.

d

= basic bore diameter

D = basic outside diameter

C, = basic dynamic radial load rating

for a radial or angular contact ball

bearing or for a radial roller

bearing*

P = equivalent radial load*

* See ANSUABMA Standards 9 and 11 for

additional information about how these values

are determined.

BALL

BEARINGS

CYLINDRICAL

ROLLER

BEARINGS

SPHERICAL

ROLLER

BEARINGS

P/C,

Figure 3 - Classification of Load (P) in Relation to Basic Load Rating (C,)

l

TABLE 1

SELECTION

OF SHAFT TOLERANCE

CLASSIFICATIONS

FOR METRIC RADIAL BALL AND ROLLER BEARINGS

OF TOLERANCE

CLASSES ABEC-1, RBEC-1

Ilt I

DESIGN &OPERATING

BALL BEARINGS

CONDITIONS

1

Rotational

Conditions

Inner Ring

Axial

Diiplaceabillty

Radial

1

d

1 Tolerance

Loading -

Over

Inner Ring

Rotating

in relation

to Load

Direction

Light

’

18

Or

Normal

1:

Load

Direction

is

Indeter-

minate

_Heavy

_1:

Inner Ring

StationaT

in Relation

to Load

Direction

Inner Ring must

be easily axially

displaceable

Inner Ring need

not be easily

axially

displaceable

Pure Thrust (Axial) Load

Light

-

Classification

Incl.

₍₁₎

18

h5

All

j6

(2)

18

j5

All

k5

Loo

k5

All

m5

zerrn:’

/

All Sizes

1

g6

CYLINDRICAL

ROLLER BEARINGS

T

d

Over

Incl.

0

40

40

140

140

320

320

500

500

All

0

40

40

100

100

140

140

320

320

500

500

All

0

40

40

65

65

140

140

200

200

500

500

All

All Sizes

All Sizes

Tolerance

Classification

(1)

$X2)

W2)

W2)

z

k5

m5

m6

n6

~6

r6

m5

m6

n6

p6

r6

r7

h6

Consult Bearing Manufacturer

SPHERICAL

ROLLER BEARINGS

d

Tolerance

Classification

Over

Incl.

(1)

0

40

$32)

40

100

W2)

100

320

mW)

320

500

n6

500

All

~6

0

40

k5

40

65

m5

65

100

m6

100

140

n6

140

280

~6

280

500

r6

500

All

r7

0

40

m5

40

65

m6

65

100

n6

100

140

~6

140

200

r6

200

All

r7

All Sizes

86

All Sizes

h6

Dimensions in millimetres

(1) Tolerance Classifications shown are for solid steel shaft.. Numerical values are listed in Table 2.

For hollow or nonferrous shafts, tighter fits may be needed.

Pa

Irt IT

.__

--

TABLE 1

SELECTION

OF SHAFT TOLERANCE

CLASSIFICATIONS

FOR METRIC RADIAL BALL AND ROLLER BEARINGS

OF TOLERANCE

CLASSES ABEC-1, RBEC-1

Dimensions in inches

DESIGN &OPERATING

BALL BEARINGS

CYLINDRICAL

SPHERICAL

CONDITIONS

ROLLER BEARINGS

ROLLER BEARINGS

Rotational

Inner Ring

Radial

d

Tolerance

d

Tolerance

d

Tolerance

Conditions

Axial

Loading

Classification

Classification

Classification

Displaceabillty

Over

Incl.

(1)

Over

Incl.

(1)

Over

Incl.

(1)

0

1.57

j6(2)

0

1.57

$32)

Light

’

0.71

h5

1.57

5.51

WV

1.57

3.94

W2)

Inner Rinrr-

0.71

All

j6

(2)

5.51

12.6

mG9

3.94

12.6

m6(2)

Rotating

12.6

19.7

n6

12.6

19.7

n6

in relation

19.7

All

~6

19.7

All

~6

to Load

Direction

0

_1.57

_3.94

1.57

k5

_m5

0

_1.57

_2.56

1.57

k5

_m5

Normal

0

0.71

j5

3.94

5.51

m6

2.56

3.94

m6

0.71

All

k5

5.51

12.6

n6

3.94

5.51

n6

or

12.6

19.7

~6

5.51

11.0

~6

19.7

All

r6

11.0

19.7

r6

&&

19.7

All

r7

Direction

₀

_1.57

_m5

₀

_1.57

_m5

is

1.57

2.56

m6

1.57

2.56

m6

Indeter-

0.71

3.94

k5

2.56

5.51

n6

2.56

3.94

n6

minate

Heavy

_3.94

_All

_m5

5.51

7.87

~6

3.94

5.51

~6

7.87

19.7

r6

5.51

7.87

r6

19.7

All

r7

7.87

All

r7

Light

Inner Ring must

be easily axially

Normal

All Sizes

86

All Sizes

All Sizes

g6

Inner Ring

displaceable

Stationary

Heavy

in Relation

to Load

Direction

Inner Ring need

Light

not be easily

axially

Normal

All Sizes

h6

All Sizes

h6

All Sizes

h6

displaceable

_Heavy

Pure Thrust (Axial) Load

All Sizes

j6

Consult Bearing Manufacturer

(1) Tolerance Classifications shown are for solid steel shaft.. Numerical values are listed in Table 2.

For hollow or nonferrous shafts, tighter fits may be needed.

TABLE 2

SHAFI’ FIlTING

PRACTICE

FOR METRIC RADIAL BALL AND ROLLER BEARINGS

OF TOLERANCE

CLASSES ABEC-1, RBEC-1

Part I

r

I

TOLERANCE CLASSIFICATIONS

d

16

h6 h5 .js

16

ks k6 mS m6 n6 p6 r6 I7

Devi- Shaft Rwul- Shaft Raul- ShnR Red- Shaft Red- Shaft Rest& Shaft Red- Shnfi Raul- ation Lkvi- tan, Devi- *ant Dwi-

Shah Red- Shaft Red- Shaft Red- Shaft Raul- ShnR Resul- Shaft Raul- ,.“, Derl- *a”, Devi- tan, DWI- tsnt Devi- tant DA- tant Devi- tsnt Lkvi- tan, Dtri-

stion Fit stion Fit stion Fll nilon Fit stion Fit ation FR tant tkvi- tan, Devi- tant 131

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I

I S-Y YYI IL>> 102,’ +265 1851. t&8 213T +I85 3lOT +I85 340 I 801-1 1 1 0 -26 .I 821. 1 0 1 56L 1 1 +I2 28L t28 28L t40 0 +74 34T +I56 IOOT t266

900 -IW -82 74T -56 1 IWT 1 i -20 ll2T -28 l2liT 0 l4OT +34 l74T +Wl .-- lwi- --_. +,tn .-._ ,c4.T _“I. 2lOT t3GU A,,” ,c,” !lW’ “,YYl -L”,,

TABLE 2

SHAFT FITTING

PRACTICE

FOR METRIC RADIAL BALL AND ROLLER BEARINGS

OF TOLERANCE

CLASSES ABEC-1, RBEC-1

Dimensions m lnclws Deviakmsr and Fits in O.ooOl lncl~s d

I

TOLERANCE CLASSIFlCATlONS I

g6

h6 N is j6 Its k6 ms m6 n6 p6 r6 r7

Devi- Shaft Red- Shaft Red- Shaft Rest& Shaft Raul- Shaft Red- Shaft Red- Shaft Red- Shaft Red- Shaft Rsul- Shaft Red- Shaft Red- Shaft Red- Shaft Red- ario” Devi- tant Devi- tan, Devi- tnnt Devi- tani &vi- tant lkvi- tnnt Lkvi- tmt &vi- tan, Devi- tant lkvi- tant De+ tant DA- tan, Devi- tant ation Fit stion nt atian Fit atlon Fit ation Fit stion Fit ation Fn ation Fit ntion Fit stion Fit stillon Fit stian Fit ntion Fit

I i ~~~~ ~~~ ~~~~~ i 0 5L 3L 2L +I IL +2 IL +2 OT +4 2T -3 :: IT .i 3T -i 3T -I 4T -I 5T 0 ST +2 -IT -2 6L 0 4L 0 t2 IL +3 IL t3 OT ::: -I ST -I 6T 0 6T t5 2T -6 IT -4 3T -2 +2 8T -2 7L 0 4L 3L t2 IL t3 IL t4 OT .; 3T -I ST -I 6T 0 7T +6 -7 IT -4 3T +3 0 -3 8L 0 t2 2L +4 2L +4 t7 3T -4 -8 IT -5 -2 6T -2 8T +I :$ +3 IIT 0 -4 IOL 0 6L t2 +4 t5 +7 +S 4T +10 4T -4.5 -10 0.5T -6 4.5T -2 6.::: -2 8.::: +I 9.:T +I Il.:% +4 l2.5T t4 l4.5T 0 IIL 0 7L +2 3L +6 t9 4T +I2 t15 -6 .i: 2T -7 6T -3 IIT +I I:; +4 IST +4 I:: t8

0 -5 13L 9L .i ST

+2 4L t5 4L t7 IT +I0 IT +ll ST +I4 +I8 2:: +9

W t23 IST -8 -13 3T -4 IOT -4 l3T +I IST +I l8T +5 l9T t5 26T +I5 3lT

0 -6 l5L 0 IOL +3 4L +6 4L t8 IT tll 1T +I3 6T t16 IIT +27 IiT +35 267 -IO -I5 4T -10 IOT -4 l3T -4 l6T +I I8T +I 21T t6 23T +6 30T +I7 37-l’ +26 45T 0 -6 l7L 0 IIL t3 5L +6 5L t9 2T +I5 7T +I8 ?T +24 l2T +3l 20T +42 30T .I) 1 -17 i hT i -,I 1 l2T1 1 I -5 I IST I -5 I l8T1 t2 I 2lT1 I

, -3 -. .-. -~

1 -6 1 l7L i 0 I IILI I 1 +3 1 5Lt +6 1 5Li +9 1 2TI

I

1 +I5 I 7T I +I8 1 7T I t24 I l2T 1 +3l I 2UT1 t43 I 0

-I2 -17 6T -II l2T -5 IST -5 I8Tj +2 21T 0 -6 l7L 0 IIL t3 5L +6 +9 2T -I? -17 6T -II l2T -5 IST -5 1::: t2 21T 0 -7 19L 0 l3L +3 6L t6 6L +II 2T -1.4 -10 lT -11 IAT -6 l7T -6 2OT +2 25T

1 +7 1 27T1 +7 1 30T 1 +I2 1 36T1 +20 1 43T1 t3l I

+I5 7-I’ +I8 7T t24 I2T t31 2l-n t44 33T +5l 33’1 +7 27-r t7 30T +I2 36T t20 43T +33 S6T +33 hTl

I

+17 8T +20 8-T 1 +26 l3T -I 1.

. ,

-

.

0 I

I

-7

I

I

l9L

77

I

I

0 I

I

13L

I

I

I

I

1 1 +3 1 -61 6L1 t6 1 6L1 tll

.,4

-10

,

-II

. _

IdT

. .

I7Tl

0 I -7

I

2lLl

01

l4LI 1 1

I .li I

I

I

-16

-9,

QT

I.w

I

I

I

t3 -71

I

IWI 7L I +7

I

7Ll +I1 0

-16

1 -1; 1

OT I .I; I IfiT I

I

I

-8 I

l9TI -7 1 23T 1 +Z 1 77l’I

I

‘-

_. _. . ._. a . _. I

I -7 I 2lL

I

0 I

14L

I

I

1 t3 1 7Li +7 1 7L1 +II I 2T1

I

I -I

_. , . . . . “ . - _.. ._ _.. - - . - . -- -

-1;

-8 24L 0 I6L +3 8L +8 8L +I3 $20 9r t31 l6T t43 2TT +65 JUI T,., ,I,, -24 IOT -16 l&T -8 21T -8 26T +2 3:; +9 38T +I6 49T t27 6lT t50 83T +50 92-r 0 -8 24L 0 I6L +3 +8

-I8 -24 IOT -16 IST -8 2;; -8

8L +I3 +20 t31 16T t43 27T t68 52T t77 52’1 26T +2 3:; t9 3;: +I6 49T +27 6lT +52 86T +52 95’1 n -9 7hl ” 171 t3

I

9L t9 9L +12 0 I +22 IOT +AR 1 1IT +7h WT +I77 COT

1 +7 1 27Tl t7 I 30T I +I2 I 36TI +20 I 43TI t30 I 54T

._ _..

I

-18 -CR -SAT ST t29 +I5 ACT IST +39 &,A : 1 1 +I7 I ST I +20 I 8T I t26 I l3T 1 -I 1 +R 1 ._ 3lTI ..~ t8 I 34T 1 +I? 1 4Crl-1 _I

i +I8 1 8T 1 +22 1 ST I +29 I 15T 1 -I

I

+R 1 UT1 +R I 1RTl +I5 I ACTI +,A

-2;

0 -20 0 -26 -2 -9

;iT -Ii iar

-9 23T -9 29T 6 3iT .__ ._ . +10 42T +3l 68T t59 96-k +$I 1071 _‘. 26L 0 l7L t3 2:: +9 9L +12 3;T +22 lm- +48 3lT t78 61T t89 61’1 IIT -17 2oT -9 -9 29T 0 +10 42T +31 68T t6l 98T t6l 109.1 29L 0 2OL 1 +4 IOL +I0 IOL +I4 0 t26 12T t54 1 35T +89 69T +I00 69T 30T -IO 34T -10 40T 0 4AT I _I I II, , I .A , I .a”. <AT I I _I I _{I I} I I r-i< Ia., I “7. P”T I ILCI I”, ll9T t69 l3OJ 2OL t4 IOL +10 IOL t14

-10 40T 0 :T I t26 l2T MT -IO 34T +I2 56T I I +s4 35T t93 73T +I04 73T +35 84T +73 I23T t73 l34T 22L -::

IIL +I1 IIL +I6 0 I

I

1 t29

I+131

I 68~1 l3T I

I

I

I

I

I

I 1 t6l 1 +39 1 IOOT I +83 1 39T It105 83T +I18 83T

39T 44T -II 5crT 0 55T 144T +83 1571.

TABLE 3

SELECTION

OF HOUSING TOLERANCE

CLASSIFICATIONS

FOR METRIC RADIAL BALL AND ROLLER BEARINGS

OF TOLERANCE

CLASSES ABEC-1, RBEC-1

DESIGN AND OPERATING

CONDITIONS

TOLERANCE

Rotational

Conditions

Loading

Other

Conditions

Outer Ring

Axial

Displaceahility

CLASSIFICATION

(1)

Light

Normal

or

Outer Ring

Heavy

Stationary

in relation

to load

direction

Shock with

temporary complete

unloading

Heat input

through

shaft

Housing

split

axially

Housing not

split

axially

Outer ring

easily axially

displaceable

G7 (3)

~57 (2)

r-I6 (2)

56 (2)

Load

Direction

indeterminate

Outer RinK

in

Rotatinr:

relation to

load direction

Light

Normal or heavy

Heavy shock

Light

Normal or heavy

Heavy

Transitional

range (4)

K6 (2)

Split

not

Mf5 (2)

recommended

N6 (2)

_

Outer ring not

Thin wall

easily axially

housing not

displaceable

~‘6 (2)

split

(1) For cast iron’ steel housings. Numerical values are listed

in Table 4. For housings of non-ferrous alloys tighter fits may

be needed.

(2) Where

wider tolerances are permissible, use tolerance classifications H8, H7, 57, K7, M7, N7 and P7 in place of H7, H6,

56, K6, M6, N6 and P6 respectively.

(3) For large bearings and temperature differences between outer ring and housings greater than 10 degrees C, F7 may be

used instead of G7.

TABLE 4

HOUSING Fi’ITING

PRACTICE

FOR METRIC RADIAL BALL AND ROLLER BEARINGS

OF TOLERANCE

CLASSES ABEC-1, RBEC-1

Dimensions III M~ll~mctrrs Part I

I 1 TOLERANCE CLASSWICATIONS

d

F7 G7 H8 Hl H6 J6 17 K6 K7 M6 M7 N6 N7 P6 17

Holaing Rerul- Housing Red- Housing Raul- Homing Red- Houring Red- Houdng Red- Housing Resul- Holaing Raul- Housing Rsul- Housing Red- Housing Raul- Houhg Red- Housing Red- Housing Raul- Housing Hrsul- over inch 211; Devi- tan, Devi- tl”t Devl- tant Devi- tant Devc tant Devi- tant nevi- tnnt lkvi- tmll nevi- tant Devi- tn”t Devi- tant Jkvi- tmt Devi- tant Devi- tnnt Devi- ,a,,,

ntion Fit ation FM at ion Fm .stion Fit ation Fit atlon Fit atlon Fit ation Fit ation Fit ation Fit stion Fn ation Ftt ation Fit ation Fit atiun Fit IO +o +I6 42L +6 32L 0 3.5L 0 26L 0 19Ll -5 1 14LI -8 1 18LI -9 1 IOLl -12 1 14L1 -15 1 4L1 -18 1 SLI -20 I IT/ -23 1 3L1 -26 I 7Tl -251

I 3rl

I8 -8 t34 16L +24 6L +27 0 +1a 0 +I1 0 t6 ST +I0 8T +2 9T t6 127 :; 157 -0 1iT -9 2OT -5 23T -15 26T -II 29 1~ 18 +o +20 SOL f7 37L 0 42L 0 3OL 0 22L -5 l7L -9 21L -I1 IIL -15 15L -17 5L -21 9L -24 2T -28 2L -31 w -35 5 I

30 -9 +41 20L +28 7L +33 0 +21 0 +13 0 +B 5T +12 9T +2 IIT t6 IST -4 17T 0 21T -11 24T -7 28T -18 3lT -I4 351 30 +o +25 611. +9 45L 0 SOL 0 36L 0 27L -6 2IL -11 25L -13 14L -18 18L -20 7L -25 1IL -28 IT -33 3L -37 imr -42 61. 50 -II t50 25L +34 9L t39 0 +25 0 +I6 0 +10 6T t14 11T +3 13T +7 IaT -4 2OT 0 25T -12 28T -8 33T -21 37T -17 42 I 50

I

I

to

I

t30

I

73LI +I0

I

53LI

0 I

59Ll

0 1

43LI

0 1

32LI -6 1 26Lj -12

1

31LI -15

1

17LI -21

1

22L/ -24 1 8Ll -30 l 13Ll -33 l ITI -39 I 4L1 -45 I 13T1 -51 I 8rl 80 -13 +64-J 3OL +40 IOL +46 01 t30 0 t19 0 +13 6T 1 +I8 1 12T1 t4 1 l5Tl t9 1 21T -5 24T 0 3uT -14 33T -9 39T -26 4sr -?I 51’1‘ 80 +o t36 86L +12 62L 0 69L 0 5OL 0 37L -6 31L -13 37L -18 19L -25 25L -28 9L -35 ISL -38 IT -45 5L -52 l5T -59 Yl

120 -15 t71 36L t47 12L t54 0 +35 0 t22 0 +I6 6T +22 13T +4 18T t10 25T -6 28T 0 35T -16 38T -10 45T -30 52T -24 59T 120 .:i 1:: %i 1:: ::t, t6: 8lL 0 58L 0 43L -7 36L -14 44L -21 22L -28 3OL -33 IOL -40 18L -45 2T -52 6L -61 l8T -68 ILrI 1 150 t ._. .- 1 -- 1 ~~ 1 ]

0 I

+401 01 +25l O] +18] 7T] t26 ] 14T] t4 ] ZIT] +12 ] 2gTl _. -8 I 33TI 01 4oTI .~ -20 I 45T1 _t -12 I 52T1 -36 I 6lTI -28 I 68’1 I

I

I50 to t43 IOBL t14 79L 0 88L 0 65L 0 SOL -7 43L -14 5lL -21 29L -28 37L -33 17L -40 25L 45 5L -52 13L -61 I IT ~68 3.1 I80 -25 +a3 43L +54 l4L +63 0 +40 0 +25 0 +I8 7T t26 14T +4 21T +I2 28T 8 33T 0 407 -20 45T -12 52T -36 6lT -3 681 I80 I I +0 I t50 I l26Ll +I5 I 9lLI 0 , lO2Ll 0 I 76L1 0 , 59L, -7 , 52L, -16 , M)L, -24 , 35L, -33 I 43L. -37 n 22L. -46 . 30L. -51 , 8L. -60, IbL. -70 m IIT. .79. 3.1‘ I

250 -30 t96 SOL t6l ISL t72 0 t46 0 +29 0 t22 n- t30 1 16TI t5 1 24TI +13 1 33T -8 37T 0 46T -22 1 51T 1 -14 6OT -41 70T -33 7Yl 250 +o t56 l43L t17 lo4L 0 l16L 0 87L 0 67L -7 6oL -I6 7lL -27 4OL -36 SlL -41 26L -52 35L -57 IOL -66 21L -79 I2T -88 I I’

31s -35 +I08 56L +69 l7L +a1 0 t52 0 t32 0 t25 ?T +36 l6T t5 27T +I6 36T -9 4lT 0 52T -25 57r -14 66T -47 79T -36 881’ 315 to i62 l59L +I8 ll5L 0 129L 0 97L 0 76L -7 69L -18 79L -29 47L -40 57L -46 3OL -57 4OL -62 14L -73 24L -87 trr -98 II

400 -40 t119 62L t75 I8L +89 0 t57 0 t36 0 t29 7T +39 18T +7 29T t17 4oT -10 46T 0 57T -26 62T -16 73T -51 87T -41 YBI’

scml I +o I +76 1 I%Ll t22 I l42LI 0 I l6oLl 0 I IZOLI 01 94L.l -7 1 87LI -22 1 98L1 -44 1 SOLI -70 1 5OL1 -70 1 24LI -% 1 24LI -88 I 6L1 -114 I 6L1 -122 I 28T1 .I48 I 630 -50 t146 76L t92 22L +I10 0 +70 0 +4l 0 +37 7T +40 22T 0 44T 0 703 -26 7oT -26 %T -44 88T -44 ll4T -78 I227 -78 I4XI 630 +o t80 2351. i-24 l79L 0 2cQL 0 l55L 0 125L -10 I15.L -24 131L -50 75L -80 75L -80 4SL -110 45L -100 25L -130 25L -138 l3T -168 131~

8crJ -75 t160 8OL +Iw 24L t125 0 trio 0 t50 0 t40 IOT +56 24T 0 SOT 0 SOT -30 am -30 IIOT -50 IOUT -SO 13OT -88 138T -88 l68I ml +o t86 276L t26 216L 0 240L 0 ISQL 0 156L -10 146L -26 164L -56 IM)L -90 ICCJL -90 66L -124 66L -112 44L -146 44L -156 0 -IYU 0

IO00 -loo +I76 86L +I16 26L +I40 o t9O o +56 0 t46 IOT +64 26T 0 56T 0 9OT -34 9OT -34 124T -56 ll2T -56 l46T -100 156T IOU Iyol~

1 I -3

IOOII +o t98 328L t2a 258L 0 2WL 0 230L 0 191L -10 ISIL -28 2u2L -66 125L -105 125L -1% 85L -145 85L -132 59L -171 59L -186 5L -225 SI. 1250 -125 +203 98L t I33 28L +I65 0 t105 0 +66 0 t56 IOT +77 28T 0 66T 0 IMT -40 lO6T -40 145T -66 132T -66 l71T -120 I86T -110 ??ST I250 I I to I t110 I 395Ll t30 I 315LI 0 I 355Ll 0 1 285Ll 0 1 238Ll -10 1 228Ll -33 1 255Ll -78 1 IaOLl -125 1 l6OLl -126 I 112L1 -173 1 112L1 -156 1 82Ll -203 I 82L1 -218 1 2OL1 -265 I !I)1 I

l6NJ -160 t235 IIOL +I55 3OL t195 0 t125 0 t78 0 t68 IUT t95 3UT 0 7gT 0 125T 48 126T -48 173T -78 156T -78 203T -140 2l8T -140 265-l I603 to +I20 470L +32 382L 0 43OL 0 35OL 0 292L -10 2821, -32 318L -92 2ooL -150 2rmL -150 142L -208 142L -184 108L -242 108L -262 3OL -320 301 ?oM) -2oo t270 IZOL +I82 32L +230 0 +150 0 +92 0 +a2 IOT +llg 32Y 0 92T 0 ISOT -58 ISOT -58 2olrr -92 MT -92 242T -170 262T -171) 3!01- !cKw 0 t130 555L t34 459L 0 53OL 0 425L 0 360L -10 3SOL -34 391L -110 25OL -175 25OL -178 l82L -243 182L -220 14OL -285 l4OL -305 551. -3711 551 25W -250 t305 l3OL t2o9 34L +280 0 +175 0 t110 0 +I00 IOT +I41 MT 0 llcrr 0 17ST -68 l78T -68 243T -110 22aT -110 285T -195 305T -11)s 3711 I L= Lmse. T= Tight

TABLE 4

;J

HOUSING FI’ITING

PRACTICE

FOR METRIC RADIAL BALL AND ROLLER BEARINGS

American

National

Standards

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